dtw_2005

It seems to be working well so far. I think I get several errors on boot before the apple loading screen, but it seems to be working well. Many thanks @Jake Lo! I have what I believe are a few open core error log files in the EFI volume that may correspond to the output I see on pre boot. It seems to creates one on every boot. I'm attaching a couple if it gives any insight. I'm attaching 2 from the 0.6.2 version as well as the 2 from the 0.6.4 version. Currently my brightness control isn't working, but I do see instructions in the previously mentioned guide for a previous version of macOS that I'm looking into. Again, Thank you! Archive.zip

Awesome, Thank you.

So, I had some success. I reinstalled as per the above guide. since I already had the image created and it at least boots to the post setup and lands on the desktop once. However, after install, before rebooting, I mounted the EFI volume and replaced the files with the OC 6.2 package posted here. I haven't tested further yet, I'm still waiting on my wifi card, but it does seem to reboot successfully to the OS without bootlooping. Woohoo! Maybe there is a bad kext file in the 6.3 version with the specific e7450 model that both i and @ronald77 have or maybe there is an issue with the 6.3 version all together? Both are the work of @Jake Lo , so thank you. @Jake Lo any ideas? Again, I really don't know what I'm doing, so apologies if I'm not providing good info. Note that the "Open Core" boot option does nothing, I have to set the HDD boot option as primary.

I'm new to all this, and I don't really know what I'm doing. I also have an E7450 with an Intel Core i5-5300U. I have essentially the exact same experience as described by @ronald77. I followed the Big Sur instructions via The OS installs successfully. I get through the setup and get to the desktop; however, once I reboot or power off and power on, the OS boot progress bar gets about 1/3 through and then restarts. Occasionally, I get the error screen as referenced in the initial post, which after passing, it then just continues to the same boot loop cycle. All of the responses by @ronald77 seem in-line with my experience. I'm on Bios A10 as that seems to be the one mentioned in the guide referenced but for a previous version of macOS, so I wasn't sure if I should updated the bios further. I've loaded the default values and ensured that the AHCI and UEFI settings are in place. I'm not sure about the "FIle Vault" question, but I did not format the SSD to have any of the encryption options, which maybe means I don't have "File Vault" enabled. I have yet to replace the wifi card, but have a dw1560 on order. @ronald77, did you by chance figure out how to move forward?